tamerlan spent six months in russia last year. top cops want to know if the attacks are tied to islam eck terror training camps. item, may 2012, u.s. jurors hear that express ives experts found a pressure cooker containing smokeless gun powder in the texas motel room of a soldier planning to blow up fort hood military troops. item, may 2010 one of three devices used in the times square bombing was a pressure cook. >>> getting to and from the villages is dangerous for the military and the roads are often lined with ieds. >> on patrol in afghanistan, i saw items sold right outside their base used to attack soldiers. >> many times the ieds used against the military are made with crude devices. a pressure cookers and fertilizers and a lot of times you can see that the pressure cooker is being sold right in the market right next to the fertilizer store. >> the 506 lost two soldiers when taliban fighters set their deadly sights as they exited the vehicle. >> was it your impression they were going to use that for another massive bombing?